| 摘要 |
Gallium values are separated and recovered from strongly basic aqueous solutions thereof, e.g., Bayer process aluminate liquors, by (i) contacting such basic solution with an organic phase comprising an organic extractant and an organic solvent and liquid/liquid extracting gallium values therefrom, and permitting phase separation into an aqueous phase and an organic phase containing said extracted gallium values; (ii) contacting said organic phase with a solution of an acid halide in part comprising acidic phase recycled from the below stage (iv), after the selective extraction thereof, and liquid/liquid extracting gallium values therefrom, and permitting phase separation into a second organic phase and an acid phase containing said extracted gallium values; (iii) adjusting the halide ion concentration of the acidic gallium phase; (iv) selectively extracting gallium values from said acidic gallium phase; and (v) recovering such selectively extracted gallium values.
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